Christen inverted system orings - part numbers and source

[tectweaker]

Planning to clean the inverted oil system in next oil change.

I believe there is a oring in the sump.

Anybody knows the part number or source for that?

Any other orings (needle valve etc) should I be replacing as well? Part numbers and sources would be great.

 

[RV8JD]

Below is a link to the Christen 801 Series Inverted Oil System Product Manual. It may have what you need:

https://drive.google.com/file/d/18MQzs-w5IGZDJ2JzgmAmU9M-czipRzFs/view?usp=sharing​

This Extra document says to flush the system every 300 hours:

https://drive.google.com/file/d/1O7lzeo-YuRLYwpRwsToWGd7ZNpqf1fv4/view?usp=sharing​

... as does this Lycoming SI No. 1397:

https://drive.google.com/file/d/1xdrcJaqVhFpAkSW-9Jg32kc4Ub8z8ur3/view?usp=sharing​

I think the oil suction screen crush gasket is the same as those for the regular horizontal sump (for the IO-320 & IO-360), which are either of these: Lycoming P/N 06E19769-1.00 Crush Gasket, OR, MS35769-21 Crush Gasket - ACS Part # AN900-16.

Of course, the oil suction screen should be inspected and cleaned every 100 hours or at every Annual Condition Inspection, irrespective of the inverted oil system cleaning time interval.